Do we really need a bigger catch can???

The Oct 26 rule revisions are calling for a 6.75 gal catch can on the cars. Collins asked us if we ever filled our can which is considerably smaller and our response was that we have never had to empty it let alone fill it. My question is to u all out there...... Have you guys and gals ever filled yours, and do you think this rule ammendment is necessary?

 

can

never more than a cupfull, but I think the intent is to handle a piston failure.I do think its a little overboard, but they haven't outlawed oil yet. maybe next year

 

this is from the nhra website under 2010 revisions. looks like 2 gal is the max they'll ask for

Catch can/vent tube system mandatory. Twiston/quick-disconnect fittings between the
vent tube hoses and the valve cover vent tube adapters must incorporate a secondary
locking device such as a hasp pin; ball lock pin prohibited. Tape is not a satisfactory
primary or secondary locking device. Double clamps are required on each end of all
hoses used in the vent system, including the dry-sump vents. Minimum 1 1/4-inch inside
diameter hoses are required from each valve cover to the catch can inlets and/or frame
rails and from each frame rail outlet to both catch can inlets. Minimum catch can(s)
capacity is a one-gallon sump (i.e., below the bottom baffle) when the valve cover
discharges are routed through the upper frame rails; otherwise a two-gallon sump
capacity is mandatory. Minimum catch can inlet and outlet/discharge configuration is
two 1 1/8-inch inside diameter openings (or equivalent area). NHRA accepted vent
tubes/hoses are mandatory for all connections; see NHRA.com for a list of
accepted vent tubes/hoses. Vent tubes must be unobstructed from the interior of the
valve cover to the interior of the catch can; i.e., no orifices, reduced areas, filler
materials, etc. Pan/crankcase vacuum systems, of any description, are prohibited. See
General Regulations 1:13.
Page

 

2010 NHRA Rule Amendments
As of October 26, 2009
31
NHRA-accepted catch can/vent tube system mandatory. Twiston/ quick-disconnect
fittings between the vent tube hoses and the valve cover vent tube adapters must
incorporate a secondary locking device such as a hasp pin, ball lock pin, etc. Tape is not
a satisfactory primary or secondary locking device. Double clamps are required on each
end of all hoses used in the vent system, including the dry-sump vents. Double O rings
required at each breather hose to valve cover attachment. Minimum 1 1/4-inch inside
diameter hoses are required from each valve cover to the catch can inlets and/or
framerails and from each framerail outlet to both catch can inlets. Minimum catch
can(s) capacity is 6.75 gallons an eight-quart sump.

Hell i would think the funny car guys would fill it as quick as a dragster does???

 

Funny cars go through the chassis. More room.

 

This is just another stupid rule. I have burnt pistons and headgsks. and had all sorts of msl parts depart the block and never had a qt. of oil in the catch can on an a-fuel car.
Another new rule says you have to use a 10 lb pressure switch to activate the safety shutdown system. I can guarantee you that this will never work.
I have a transducer and channel on my racepak that monitors the pan pressure and finally took it off because I have burnt pistons and headgsks etc and the pan pressure hardly changes at all.

 

wow

I just hope NHRA keeps the % for TAD the same.....all the other rules are kuhl wit me son....

your pal, S!CTOR

 

No we do not need a bigger catch can / puke tank.

I put a 5 gallon fuel jug between the wing struts for a size estimate. Well yes there is room for a 6.750 gallon tank. Not very aerodynamic. This is going to block air needed to deploy the chutes.

Here is the real problem with this idea.

A can that LARGE with the normal oil mist and fuel vapors is nothing but a giant combustion chamber. Also known as a BOMB.

So what is next a ballistic blanket to cover the BOMB that is now being mandated. Maybe shields to protect the tires from it when it goes off. Oh then we are going to need shields to protect the parachutes from it too.

I am really curious as to where this idea came from.

Any body want to stand up and take credit for it.

I am open to hear your reasons why you think this will reduce the oil on the track.

Do you think it will also add to safety.

 

mistake?

Is it possible that this is a mistake? Seems totally ridiculous to me that you need a 27 quart catch can? Who runs more than 20 quarts even in a drysump and don't most dragsters run wet sumps?

Kinda makes you wanna switch to the short cars with the motor in the front huh?

 

We run a dry sump and I emailed Mr. Collins trying to get some clarification on this rule; since essentially I'm the same as a TA/FC . I don't need as big of a can as a wet sump....and TAD as a whole surely doesn't need the capacity of T/F. I was asked at Brainerd Nat and Indy Nat. what size my catch can was. Mine is 5.75G, large Spitzer, and is PLENTY big. I've not drained more than one Solo cup out of it, and that was after three races. I figure if we do have to change it..might as well have it made out of Ti from Diversatech or have Taylor make me a ballistic blanket...I'm sure that won't be too far away Also...don't forget the "approved" breather line.

Brandon Booher
NHRA TAD #44

 

AHHHH, the winds of change....kinda smell like bulls@#t. Maybe the NHRA should increase the purse if a TAD car has to meet spec's of a TF car

 

The new Spitzer tank is available now, there is a picture of it in National Dragster.

Brandon Booher
NHRA TAD #44

 

Yea for about 1500 dollars. Would some one give me one example of an a-fuel dragster dumping anything on the track because of the present size requirments forthe catch can????? I tell you I don't know who comes up with rule changes like this one but it is crazy.

 

hey will Scot johnson here there is no way even if you burn a piston down to the rod you will ever get enough crankcase pressure to ativate a transducer no matter where you put it

 

Scott I can testify to that!!! I ran a pan transducer in my a-fuel car for a couple of years and even burning pistons and kicking rods out there was not enough pan pressure to hardly notice let alone enough to activate a 10 psi pressure switch. I think someone just pulled this one out of a hat. I know there was no testing done.

 

Hat...ass...something along those lines.

Brandon Booher
NHRA TAD #44

 

and if the blown cars didnt have a lite weight wing on the back we wouldnt have to worry about cabling it on to the chutes......

these rule change to me both seem like blown applications rules that a/fuel are getting caught up in.

 

After researching this deal the leah installation reads the pressure transducer mounted near but not on the engine and a airline from the injector manifold to transducer its for they say Catostrophic failure i honestly don't think you can activate it unless you blew the injector off